Kourtney Kardashian had a fuller stomach that appeared to be a growing baby bump when she attended Kim Kardashian's birthday bash on Friday.

Mail Online published photos on Monday of Kourtney's bulging belly sticking out from her cropped knit sweater. She was posed alongside her boyfriend Scott Disick and her sister Khloe Kardashian and looked as if she is expecting her third child. The trio was at Tao at the Venetian Hotel in Sin City on Oct. 26.

In another photo standing next to Kim and Khloe, Kourtney appeared to have a round belly compared to her sisters' flat ones.

Earlier this month, Kourtney fueled rumors she is expecting her third child when she stepped out wearing baggu high waist pants with a cropped tee shirt.

Kourtney welcomed their first child, a son Mason in December, 2009 and their daughter Penelope last year.

During an episode of Keeping Up With The Kardashians that aired in August, Kourtney hinted that's she was open to a third pregnancy. When family members opposed the idea of Kim eating placenta following the birth of her daughter North West, Kourtney joked she would "have a third child just to eat the placenta."

Disick would later share a photo of Kourtney lifting up her shirt onhis Instagram and write that she "looked like an angel." It caused speculation that she might be pregnant with their third child, that he removed the image.

The couple had relationship trouble earlier this year after a male modelc aimed to be their son Mason's biological father. Male model Michael told InTouch Weekly in March that he slept with Kourthney in March, 2009--nine months before she gave birth to Mason on Dec. 14, 2009. He said they met after they posed alongside each other for 944 magazine in August 2008.

On Aug. 15, Kourtney said a statement to E! News that she is "setting the record straight" that Scott Disick is her three-year-old son's biological father.

"After three-and-a-half years of rumors and lies being spread by an individual I met briefly at a photo shoot, I am setting the record straight that Scott is Mason's father. While it saddens me to have to address these ridiculous lies--especially when the truth was never in doubt--this story must be put to rest."